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Cable compound pelletizer

Time：

2018-08-15

The cable‑grade pelletizing machine is a two‑stage extrusion system: the first stage employs a high‑speed co‑rotating twin‑screw extruder, which ensures excellent compatibility, plasticization, and dispersion of polyvinyl chloride resin with DOP plasticizers and various additives. The second stage uses a single‑screw extruder; its low speed, low temperature, and gentle shear characteristics complement the strengths of the first stage while mitigating its weaknesses, making it an efficient solution for blending and modifying thermally sensitive, shear‑sensitive materials today. For PVC compounds, thermal stability is a critical performance parameter. In addition to thermal aging, thermal weight loss is another key indicator for evaluating PVC cable compounds. The extent of thermal weight loss can reveal whether the raw materials used in a particular PVC cable compound are suitable for the intended service temperature range. If the weight loss…

The cable‑material pelletizing machine features a two‑stage pelletizing system: the first stage is a high‑speed co‑rotating twin‑screw extruder, which ensures excellent compatibility, plasticization, and dispersion of polyvinyl chloride resin with DOP plasticizer and various additives. The second stage is a single‑screw extruder; its low speed, low temperature, and gentle shear characteristics complement the strengths of the first stage while mitigating its weaknesses, making it an efficient solution for the compounding and modification of thermally sensitive, shear‑sensitive materials today.

PVC compounds have temperature resistance and other critical performance indicators. In addition to thermal aging, thermal weight loss is another important parameter for evaluating a PVC cable compound’s suitability for a given temperature range. The extent of weight loss indicates whether the raw materials used in the compound are appropriate for that specific temperature; excessive weight loss suggests that additives may readily volatilize or precipitate out at the intended service temperature, causing the material to harden and become brittle, thereby losing its original properties. If a PVC compound rated for 90°C exhibits a thermal weight‑loss level comparable to that of a 70°C‑rated compound, then it cannot be considered suitable for 90°C applications. Thermal stability time at 200°C—reflecting the material’s ability to withstand heat and high temperatures—is crucial: a short stability window can lead to scorching during high‑temperature processing, bubble formation during extrusion, and severe degradation of the material’s aging performance after extrusion. Specific gravity: there is no standardized, definitive specification for this property, yet it is closely linked to product quality and cost. Proper filler loading helps achieve the desired performance characteristics specified by standards or customers, whereas excessive filling, while reducing costs, significantly degrades mechanical properties, increases susceptibility to tearing, and raises the likelihood of cable cracking.

Cable compound pelletizing line: high‑mixing machine → screw‑type automatic feeder → twin‑screw pelletizer → single‑screw pelletizer → opposed‑air‑blast hot‑cutting die head → cyclone separator → cyclone separator → air‑cooled vibrating screen → finished‑product hopper.